3 files changed, 15 insertions, 4 deletions

diff --git a/fs/gfs2/glops.c b/fs/gfs2/glops.c
index f88dcd9..1b192c8d 100644
--- a/fs/gfs2/glops.c
+++ b/fs/gfs2/glops.c
@@ -142,8 +142,8 @@ static void rgrp_go_sync(struct gfs2_glock *gl)
 	GLOCK_BUG_ON(gl, gl->gl_state != LM_ST_EXCLUSIVE);
 
 	gfs2_log_flush(gl->gl_sbd, gl);
-	filemap_fdatawrite(metamapping);
-	error = filemap_fdatawait(metamapping);
+	filemap_fdatawrite_range(metamapping, gl->gl_vm.start, gl->gl_vm.end);
+	error = filemap_fdatawait_range(metamapping, gl->gl_vm.start, gl->gl_vm.end);
         mapping_set_error(metamapping, error);
 	gfs2_ail_empty_gl(gl);
 
@@ -170,7 +170,7 @@ static void rgrp_go_inval(struct gfs2_glock *gl, int flags)
 
 	WARN_ON_ONCE(!(flags & DIO_METADATA));
 	gfs2_assert_withdraw(gl->gl_sbd, !atomic_read(&gl->gl_ail_count));
-	truncate_inode_pages(mapping, 0);
+	truncate_inode_pages_range(mapping, gl->gl_vm.start, gl->gl_vm.end);
 
 	if (gl->gl_object) {
 		struct gfs2_rgrpd *rgd = (struct gfs2_rgrpd *)gl->gl_object;
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index 0132816..e6544ee 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -351,7 +351,15 @@ struct gfs2_glock {
 	atomic_t gl_ail_count;
 	atomic_t gl_revokes;
 	struct delayed_work gl_work;
-	struct work_struct gl_delete;
+	union {
+		/* For inode and iopen glocks only */
+		struct work_struct gl_delete;
+		/* For rgrp glocks only */
+		struct {
+			loff_t start;
+			loff_t end;
+		} gl_vm;
+	};
 	struct rcu_head gl_rcu;
 };
 
diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c
index 2584710..183cf0f 100644
--- a/fs/gfs2/rgrp.c
+++ b/fs/gfs2/rgrp.c
@@ -886,6 +886,7 @@ static int rgd_insert(struct gfs2_rgrpd *rgd)
 static int read_rindex_entry(struct gfs2_inode *ip)
 {
 	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
+	const unsigned bsize = sdp->sd_sb.sb_bsize;
 	loff_t pos = sdp->sd_rgrps * sizeof(struct gfs2_rindex);
 	struct gfs2_rindex buf;
 	int error;
@@ -923,6 +924,8 @@ static int read_rindex_entry(struct gfs2_inode *ip)
 		goto fail;
 
 	rgd->rd_gl->gl_object = rgd;
+	rgd->rd_gl->gl_vm.start = rgd->rd_addr * bsize;
+	rgd->rd_gl->gl_vm.end = rgd->rd_gl->gl_vm.start + (rgd->rd_length * bsize) - 1;
 	rgd->rd_rgl = (struct gfs2_rgrp_lvb *)rgd->rd_gl->gl_lksb.sb_lvbptr;
 	rgd->rd_flags &= ~GFS2_RDF_UPTODATE;
 	if (rgd->rd_data > sdp->sd_max_rg_data)